6	4
		2
	5
				5
			3
	3	1

Difficulty: Very easy (0)

5
1	2		4
		2
			5
		6		3	5
					1

Difficulty: Very easy (0)

	5		3
3	4				6
5				6	4
		3		1

Difficulty: Very easy (0)

3			4
					5
	5
				5
2
		1			2

Difficulty: Very easy (0)